Lucky Lad St. Patrick's Day Birthday Thank You CardsLucky Lad thank you cards feature green and blue detailing with a lucky clover background! These are perfect for your St. Patrick's Day laddies celebration blowout. Some features of our thank you cards: Professionally printed on 80# cardstock paper so you feel the quality. Teaches children how to send a meaningful handwritten note Easy to use because all you have to do is simply fill in and mail out 10 cards and 10 white envelopes included 4. 5" X 5.